[SEBA-501][SEBA-502] Updating SiaB documentation with uninstall instructions and removing reference to outdated file

Change-Id: I283887fd206404a0590113414c977c82e6e3e57d
diff --git a/profiles/seba/siab.md b/profiles/seba/siab.md
index 1e09d8a..3b92395 100644
--- a/profiles/seba/siab.md
+++ b/profiles/seba/siab.md
@@ -185,7 +185,7 @@
 helm install -n cord-kafka --version=0.13.3 -f examples/kafka-single.yaml incubator/kafka
 # Wait for Kafka to come up
 kubectl wait pod/cord-kafka-0 --for condition=Ready --timeout=180s
-helm install -n onos -f configs/onos.yaml onos
+helm install -n onos onos
 ```
 
 ## Install VOLTHA charts
@@ -459,6 +459,11 @@
 
 That’s it.  Currently it’s not possible to send traffic to destinations on the Internet.
 
+## Uninstall SEBA-in-a-Box
+
+If you're done with your testing, or want to change the version you are installing,
+the easiest way to remove a SiaB installation is to use the `make reset-kubeadm` target.
+
 ## Getting help
 
 Report any problems to `acb` on the CORD Slack channel.